Adjustable plastering-trowel.



o. M. HOWG. ADJUSTABLE PLASTERING TROWEL. APPLICATION FILED FEB. 19, 1913.

1,083,099.. Patented De@.so,1913.

UNTED STATES CARL M. HOWG, OF'SISSETON, SOUTH DAKOTA.

ADJUSTABLE PLASTERING-TROWEL.

Specification of Letters Patent.

Application led February 19, 1913.

Patented Bec. 30,1913.

serial No. 749,452.

T0 all whom it may concern Be it known that I, CARL M. Howe, a subject of the King of Great Britain, residing at Sisseton, in the county of Roberts and State of South Dakota, have invented new and useful Improvements in Adjustable Plastering-Trowels, of which the following is a specification.

The invention relates to trowels and more particularly to the class of adj ustab-le plastering trowels.

The primary object of the invention is the provision of a trowel wherein the blade or plate thereof be readily and easilj7 adjusted so asl to curve it outwardly orinwardly for the plastering of cylindrical bodies either on the outer or inner surface thereof, and also which may be used for plastering straight surfaces.

Another object of the invention is the provision of a trowel of this character wherein the plate is formed from flexible steel so that it can be readily curved or brought into a flat plane, thus enabling the operator to use the same on round or ilat surfaces for the plastering thereof, the adjustment of the plate or blade being accomplished in a quick and convenient manner.

A further object of the invention is the provision of a trowel of this character which is simple in construction, strong, durable, readily and easily adjusted, and inexpensive in manufacture.

Vith these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, and pointed out in the claims hereunto appended.

In the drawingz-Figure 1 is a perspective view of a trowel constructed in accordance with the invention, showing its blade curved. Fig. 2 is a fragmentary vertical longitudinal sectional view showing the blade straight. Fig. 3 is an end elevation. Fig. l is a similar view looking toward the opposite end of the trowel. Fig. 5 is a fragmentary sectional view on the line 5-5 of Fig. 1. Fig. 6 is a fragmentary sectional view on the line 6 6 of Fig. 1.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing by numerals, the trowel comprises a main plate or blade 10 preferably constructed from flexible steel,

and is of the ordinary well-known shape for use in plastering walls or surfaces. Fixed to the plate 10 near opposite ends thereof are standards 11 and 12 respectively, each being formed with triple legs 13 which are riveted or otherwise fixed to the said plate 10, and in these standards is mounted an adjusting device presently described.

Each standard 11 and 12 is formed with spaced ears 14 between which extends a tongue forming a bearing 15. Arranged between the pairs of ears 14 of the standard 11 is an adjusting nut 16, the same being formed with a ball-like end 17 which is adapted to rest upon the tongue 15 and is provided with an annular groove 18 in which is engaged a retaining pin 19, the same being secured in the ears 14 of the standard 11 so as to lie at the outer side of the ball terminal 17 and in this manner the nut 16 is swiveled in the standard 11 and is fulcrumed on the pin 19 for slight swinging movement. Adjustably engaged in the nut 16 is a threaded stem 20 which is provided with a spherical tip or end 21, the same being arranged between the ears 14 of the standard 12 directly above the tongue 15 thereof, and passed through this tip or end 21 is a pivot pin 22 which is engaged in the ears 141 of the said standard 12 for connecting the stem thereto.

Mounted upon the stem 2O is a handle or grip 23, one end of which contacts with an abutment 211, while the opposite end contacts with a lock nut 25 threaded on the stem 20 so as to preventdisplacement of the handle or ygrip 28 longitudinally upon the stem, the latter being adjustably held in the nut 16 by means of threaded connection therewith. The nut 16 is formed with a knurled surface 26v which permits the positive turning of the same upon the stem 20 so that by adjusting the said nut 16 in one direction it will cause the bending of the blade or plate 10 outwardly, and on adjusting it in the reverse direction the said blade or plate 10 will be bent inwardly. In other words, by adjustment of the nut 16 the bladeor plate 10 can be curved into convex or concave form, thus permitting the trowel to be conveniently used on cylindrical surfaces either exteriorly or interiorly thereof. It will be clearly apparent that the blade or plate 10 can be held straight for plastering flat surfaces.

From the foregoing it is thought that the construction and manner of operation of the device will be clearly understood, and

therefore a more extended explanation has been omitted.

lVhat is claimed is 1. A trowel comprising a plate, standards iixed to the said plate in spaced relation to each other and having spaced ears, a rod pivotally connected to one pair of ears, an adjusting nut swivelly connectedto the other pair of ears and in threaded engagement with the said rod, and a handle carried by the said stem.

2. A trowel comprising a plate, standards fixed thereto and having spaced ears, a stem pivotally connected in one pair of spaced ears, a nut adjustably threaded on the stem and having a spherical portion disposed between the other pair of ears, the said spherical portion being provided with an annular groove, and a pin intersecting the said groove and mounted in the last--named ears for rotatably and swivelly connecting the nut to one of the standards.

3. A trowel comprising a plate, standards iixed thereto and having spaced ears, a stem pivot-ally connected in one ypair of spaced ears, a nut adjustably threaded on the stem and having a spherical portion disposed between the other pair of ears, the said spherical portion being provided with an annular groove, and a pin intersecting the said .groove and mounted in the last-named ears for rotatably and swivelly connecting the nut to one of the standards, the said standards being provided with split extensions forming a plurality of brace legs.

In testimony whereof I aflix my signature in presence of two witnesses.

Lno J. LUoKANrrsoH, O. L. MARVIOK.

Copias ot this patent may be obtained for ve cents each, byA addressing the Commissioner of Patents,

Washington, D. C. l 

